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ArrayCountWidget.jsx
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ArrayCountWidget.jsx
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import React from 'react';
import PropTypes from 'prop-types';
import classnames from 'classnames';
export default class ArrayCountWidget extends React.Component {
constructor(props) {
super(props);
this.state = { userCount: props.value
? props.value.length - (this.props.options.countOffset || 0)
: undefined };
}
componentDidUpdate(prevProps, prevState) {
if (prevState.userCount !== this.state.userCount) {
let count = parseInt(this.state.userCount, 10);
if (isNaN(count)) {
count = 0;
}
// Too high of a count can crash the browser. We’ve been using
// this for marriage counts and 29 is the record, so 29 seems like
// a good upper limit. Filling out more than 29 pages is probably
// not reasonable in a form anyway
if (count > 29) {
count = 29;
}
this.props.onChange(this.getValue(count, this.props.value));
}
}
// We’re expanding or contracting the array based on the count
// and returning undefined if the array should be empty
getValue = (count, value = []) => {
if (count === 0) {
return undefined;
}
const intCount = count + (this.props.options.countOffset || 0);
if (intCount < 0) {
return undefined;
}
if (intCount < value.length) {
return value.slice(0, intCount);
}
return Array(intCount - value.length).fill({}).concat(value);
}
updateArrayLength = (event) => {
this.setState({ userCount: event.target.value });
}
render() {
const props = this.props;
if (props.formContext.reviewMode) {
return (
<div className="review-row">
<dt>{props.uiSchema['ui:title']}</dt><dd>{this.state.userCount}</dd>
</div>
);
}
return (
<input
autoComplete={props.options.autocomplete}
type="number"
step="1"
min="1"
id={props.id}
name={props.id}
disabled={props.disabled}
className={classnames(props.options.widgetClassNames)}
value={typeof this.state.userCount === 'undefined' ? '' : this.state.userCount}
onBlur={() => props.onBlur(props.id)}
onChange={this.updateArrayLength}/>
);
}
}
ArrayCountWidget.propTypes = {
/**
* ui:options from uiSchema
*/
options: PropTypes.shape({
/*
* input's autocomplete attribute value
*/
autocomplete: PropTypes.string
}),
};
ArrayCountWidget.defaultProps = {
options: {}
};